104 lines
3.3 KiB
C++
104 lines
3.3 KiB
C++
// Boost.Range library
|
|
//
|
|
// Copyright Thorsten Ottosen, Neil Groves 2006 - 2008. Use, modification and
|
|
// distribution is subject to the Boost Software License, Version
|
|
// 1.0. (See accompanying file LICENSE_1_0.txt or copy at
|
|
// http://www.boost.org/LICENSE_1_0.txt)
|
|
//
|
|
// For more information, see http://www.boost.org/libs/range/
|
|
//
|
|
|
|
#ifndef BOOST_RANGE_ADAPTOR_REVERSED_HPP
|
|
#define BOOST_RANGE_ADAPTOR_REVERSED_HPP
|
|
|
|
#include <boost/range/iterator_range.hpp>
|
|
#include <boost/range/concepts.hpp>
|
|
#include <boost/iterator/reverse_iterator.hpp>
|
|
|
|
namespace boost
|
|
{
|
|
namespace range_detail
|
|
{
|
|
template< class R >
|
|
struct reversed_range :
|
|
public boost::iterator_range<
|
|
boost::reverse_iterator<
|
|
BOOST_DEDUCED_TYPENAME range_iterator<R>::type
|
|
>
|
|
>
|
|
{
|
|
private:
|
|
typedef boost::iterator_range<
|
|
boost::reverse_iterator<
|
|
BOOST_DEDUCED_TYPENAME range_iterator<R>::type
|
|
>
|
|
>
|
|
base;
|
|
|
|
public:
|
|
typedef boost::reverse_iterator<BOOST_DEDUCED_TYPENAME range_iterator<R>::type> iterator;
|
|
|
|
explicit reversed_range( R& r )
|
|
: base( iterator(boost::end(r)), iterator(boost::begin(r)) )
|
|
{ }
|
|
};
|
|
|
|
struct reverse_forwarder {};
|
|
|
|
template< class BidirectionalRange >
|
|
inline reversed_range<BidirectionalRange>
|
|
operator|( BidirectionalRange& r, reverse_forwarder )
|
|
{
|
|
BOOST_RANGE_CONCEPT_ASSERT((
|
|
BidirectionalRangeConcept<BidirectionalRange>));
|
|
|
|
return reversed_range<BidirectionalRange>( r );
|
|
}
|
|
|
|
template< class BidirectionalRange >
|
|
inline reversed_range<const BidirectionalRange>
|
|
operator|( const BidirectionalRange& r, reverse_forwarder )
|
|
{
|
|
BOOST_RANGE_CONCEPT_ASSERT((
|
|
BidirectionalRangeConcept<const BidirectionalRange>));
|
|
|
|
return reversed_range<const BidirectionalRange>( r );
|
|
}
|
|
|
|
} // 'range_detail'
|
|
|
|
using range_detail::reversed_range;
|
|
|
|
namespace adaptors
|
|
{
|
|
namespace
|
|
{
|
|
const range_detail::reverse_forwarder reversed =
|
|
range_detail::reverse_forwarder();
|
|
}
|
|
|
|
template<class BidirectionalRange>
|
|
inline reversed_range<BidirectionalRange>
|
|
reverse(BidirectionalRange& rng)
|
|
{
|
|
BOOST_RANGE_CONCEPT_ASSERT((
|
|
BidirectionalRangeConcept<BidirectionalRange>));
|
|
|
|
return reversed_range<BidirectionalRange>(rng);
|
|
}
|
|
|
|
template<class BidirectionalRange>
|
|
inline reversed_range<const BidirectionalRange>
|
|
reverse(const BidirectionalRange& rng)
|
|
{
|
|
BOOST_RANGE_CONCEPT_ASSERT((
|
|
BidirectionalRangeConcept<const BidirectionalRange>));
|
|
|
|
return reversed_range<const BidirectionalRange>(rng);
|
|
}
|
|
} // 'adaptors'
|
|
|
|
} // 'boost'
|
|
|
|
#endif
|